Advertisements
Advertisements
प्रश्न
Observe the picture given in Fig. carefully and answer the following questions.
Why is he putting a cover on his nose?
उत्तर
The mask is protecting him from dirt, pollution and exhaust of vehicles which are harmful elements. If these enter his body, he can suffer from respiratory disorders.
APPEARS IN
संबंधित प्रश्न
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
Fill in the blank
Aquatic plants and animals use _________ in water.
Give a reason why nitrogen is filled in food packets and not oxygen.
Why is carbon-dioxide gas used to extinguish fire?
Air is a mixture of many _______.
List out the uses of carbon dioxide.
______ gas is given to the patients having breathing problems.
______ is responsible for making clouds.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement
A weather cock shows the ______ in which the air is moving at that place.
